DENTAURUM Polyclav Mode D'emploi page 14

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Principle
Processing in the Polyclav under a pressure of 2.0 – 2.2 bar (32 p.s.i.) has the
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advantage of conducting away the heat of polymerization while increasing the boiling
point of the monomer, and thus guaranteeing a bubble- and pore-free hardening of the
resin. In addition, the warm water in the process vessel transfers the internal pressure
to the curing Orthocryl resin.
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Hardening in the Polyclav – Please follow these instructions exactly!
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The plaster cast must be saturated with water before it is placed in the Polyclav
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since bubble formation will occur with dried-out casts.
The Polyclav should be filled with lukewarm water (i.e. water at 40 – 46 °C / 104 – 114.8 °F)
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to 3 – 5 cm (1 – 2 inches) off the rim.
For best results, the resin must be placed into the Polyclav and pressurized
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at the right time, that is when the Orthocryl plate starts to become firm.
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The working pressure of 2.0 – 2.2 bar (32 p.s.i.) can be achieved with a compressor or
compressed air, or with a car tyre inflator if necessary, and regulated with a manometer.
The Polyclav should be pressurized until the resin is completely hardened. For the exact length of time please see instructions for use of the acrylic used.
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If the pressure should drop slightly during this period, the resin will still be hard and pore-free. It is also possible to interrupt the process to insert further
plates before the total curing time has elapsed provided that the resin has been under pressure for at least 12 minutes. Each plate must be pressurized for
20 minutes.
The Polyclav can be connected by means of a pressure hose, available under REF 070-700-00, to any office or laboratory compressed air supply
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having a working pressure of 3 – 4 bar (43 p.s.i.). Any necessary modifications or adjustments to achieve this will be more than compensated for
by the improved physical properties of the resin.
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